Battery cluster, assembling method of battery cluster and power utilization device

Abstract

The invention provides a battery cluster, an assembling method of the battery cluster and a power utilization device. The battery cluster comprises a first battery pack, a second battery pack, a first cluster frame and a second cluster frame. The first battery pack and the second battery pack are stacked in a first direction. Wherein the first direction is the height direction of the battery cluster. The first cluster frame is connected with the first battery pack, and the first cluster frame is used for providing structural protection for the first battery pack and the second battery pack. The second cluster frame is connected with the second battery pack, and the second cluster frame is used for providing structural protection for the first battery pack and the second battery pack. The battery cluster only comprises the first cluster frame and the second cluster frame, so that the size of the battery cluster is reduced, the weight of the battery cluster is reduced, and the production cost and the hoisting difficulty of the battery cluster are reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cluster, a battery cluster assembly method, and an electrical device. Background Art

[0002] Some electrical devices on the market, such as electric heavy trucks and large equipment such as energy storage cabinets, require battery packs with extremely high energy density. Therefore, multiple battery packs can be connected in parallel or in series on a cluster rack to form a battery cluster with a large energy density to meet the power supply needs of the above electrical devices.

[0003] In the related art, a battery cluster includes multiple battery packs and multiple drawer-type cluster racks. A battery pack is hoisted and pushed into a drawer-type cluster rack and fixedly connected to the drawer-type cluster rack. However, if there are too many drawer-type cluster racks, the volume and weight of the battery cluster will be increased, and the production cost of the battery cluster will be increased. Summary of the invention

[0004] The present application provides a battery cluster, a method for assembling the battery cluster, and an electrical device, which reduce the volume and weight of the battery cluster, thereby reducing the production cost of the battery cluster.

[0005] In a first aspect, the present application provides a battery cluster, including: a first battery pack, a second battery pack, a first cluster frame, and a second cluster frame. The first battery pack and the second battery pack are stacked along a first direction. The first direction is the height direction of the battery cluster. The middle battery pack is connected between the first battery pack and the second battery pack. The first cluster frame is connected to the first battery pack, and the first cluster frame is used to provide structural protection for the first battery pack and the second battery pack. The second cluster frame is connected to the second battery pack, and the second cluster frame is used to provide structural protection for the first battery pack and the second battery pack.

[0006] The battery cluster provided by the first aspect of the present application includes a first battery pack, a second battery pack, a first cluster frame and a second cluster frame. The first battery pack, the middle battery pack and the second battery pack are stacked along the first direction, so that the first battery pack and the second battery pack can simultaneously supply power to the electrical device to meet the power supply demand of the electrical device. The first cluster frame is connected to the first battery pack, and the second cluster frame is connected to the second battery pack, which is used to prevent the first battery pack and the second battery pack from being damaged by collision, thereby ensuring the service life of the battery cluster and further ensuring the normal use of the electrical device. In addition, the battery cluster only includes the first cluster frame and the second cluster frame, which reduces the volume of the battery cluster, reduces the weight of the battery cluster, and reduces the production cost and lifting difficulty of the battery cluster.

[0007] In a possible design, the battery cluster may include one or more intermediate battery packs. The multiple intermediate battery packs are stacked along a first direction, and the multiple intermediate battery packs are connected between the first battery pack and the second battery pack.

[0008] Based on the description of the above embodiments, the battery cluster includes multiple intermediate battery packs, which increases the number of battery packs and improves the energy density of the battery cluster, so that the battery cluster can adapt to electrical devices with greater power supply requirements.

[0009] In a possible design, the first battery pack is provided with a first frame and a second frame opposite to each other along the first direction. The second battery pack is provided with a third frame and a fourth frame opposite to each other along the first direction. The intermediate battery pack is provided with two fifth frames opposite to each other along the first direction. The two fifth frames are connected to the first frame and the third frame respectively. The first cluster frame is connected to the second frame, and the second cluster frame is connected to the fourth frame, so that the first battery pack, the intermediate battery pack and the second battery pack are fixedly connected between the first cluster frame and the second cluster frame.

[0010] Based on the description of the above embodiments, the first battery pack is provided with a first frame and a second frame relatively along the first direction. The second battery pack is provided with a third frame and a fourth frame relatively along the first direction. The intermediate battery pack is provided with two fifth frames relatively along the first direction. The two fifth frames are connected to the first frame and the third frame respectively, the first cluster frame is connected to the second frame, and the second cluster frame is connected to the fourth frame, which ensures the stability of the connection between the first cluster frame, the first battery pack, the intermediate battery pack, the second battery pack, and the second cluster frame, while ensuring the safety of the first battery pack, the intermediate battery pack, and the second battery pack.

[0011] In one possible design, a first exhaust channel is provided between the first battery pack and the middle battery pack. The first exhaust channel is provided on the first frame and / or the fifth frame. A second exhaust channel is provided between the second battery pack and the middle battery pack. The second exhaust channel is provided on the third frame and / or the fifth frame.

[0012] Based on the description of the above embodiment, the first exhaust channel is arranged on the first frame and / or the fifth frame, and the second exhaust channel is arranged on the third frame and / or the fifth frame. The first exhaust channel is used to exhaust the gas and condensed water in the first battery pack and the middle battery pack, and the second exhaust channel is used to exhaust the gas and condensed water in the second battery pack and the middle battery pack, so as to ensure the safety of the first battery pack, the second battery pack and the middle battery pack.

[0013] In a possible design, the first exhaust channel and the second exhaust channel are both groove structures.

[0014] Based on the description of the above embodiments, the first exhaust channel and the second exhaust channel are both groove structures, so that there is a gap between the connecting surfaces of the first battery pack and the middle battery pack, and there is a gap between the connecting surfaces of the second battery pack and the middle battery pack, so that the condensed water and gas in the first battery pack, the middle battery pack and the second battery pack can be discharged smoothly.

[0015] In a possible design, the first frame, the second frame, the third frame, the fourth frame and the fifth frame are all profile structures of steel material. The profile structure has a cavity for enhancing the structural strength of the first frame, the second frame, the third frame, the fourth frame and the fifth frame.

[0016] Based on the description of the above embodiment, the first frame, the second frame, the third frame, the fourth frame and the fifth frame are all steel profile structures, which can improve the stability of the connection between the first cluster frame, the first battery pack, the middle battery pack, the second battery pack and the second cluster frame, and improve the overall structural strength of the battery cluster to avoid collision damage to the battery cluster.

[0017] In a possible design, a plurality of first connectors are provided between the first cluster frame and the first battery pack, for fixing the first cluster frame and the first battery pack. A plurality of second connectors are provided between the first battery pack and the middle battery pack, for fixing the first battery pack and the middle battery pack. A plurality of third connectors are provided between the second battery pack and the middle battery pack, for fixing the second battery pack and the middle battery pack. A plurality of fourth connectors are provided between the second cluster frame and the second battery pack, for fixing the second cluster frame and the second battery pack.

[0018] Based on the description of the above embodiments, the first cluster frame and the first battery pack are connected by multiple first connecting members, the first battery pack and the intermediate battery pack are connected by a second connecting member, the second battery pack and the intermediate battery pack are connected by a third connecting member, and the second cluster frame and the second battery pack are connected by a fourth connecting member. While ensuring the structural strength of the battery cluster, the inspection and replacement of the first cluster frame, the first battery pack, the intermediate battery pack, the second battery pack and the second cluster frame are facilitated.

[0019] In a possible design, the number of the first connecting member, the second connecting member, the third connecting member, and the fourth connecting member are all greater than or equal to eight.

[0020] Based on the description of the above embodiments, when the number of the first connector, the second connector, the third connector and the fourth connector is greater than or equal to 8, the production cost of the battery cluster can be reduced while ensuring the structural strength of the battery cluster.

[0021] In a second aspect, the present application provides a method for assembling a battery cluster, for assembling the battery cluster described in any one of the above embodiments, the method comprising:

[0022] Obtain a first battery pack, a middle battery pack, and a second battery pack.

[0023] The first battery pack, the middle battery pack and the second battery pack are stacked in sequence along a first direction to obtain a first assembly component.

[0024] Obtain a second cluster rack.

[0025] The second cluster frame is connected to the second battery pack so that the second cluster frame and the first assembly component form a second assembly component.

[0026] Get the first cluster frame.

[0027] The first cluster frame is connected to the first battery pack to form the battery cluster, and the first battery pack, the middle battery pack and the second battery pack are fixedly connected between the first cluster frame and the second cluster frame.

[0028] In a third aspect, the present application provides an electrical device, characterized in that it comprises a battery cluster according to any one of the above embodiments. The battery packs in the battery cluster are used to provide electrical energy.

[0029] The beneficial effects of the battery cluster assembly method provided in the second aspect and the power-consuming device provided in the third aspect can be found in the beneficial effects of the first aspect and the possible implementation methods of the first aspect, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of the structure of a battery cluster in an embodiment of the present application.

[0032] Figure 2 This is a schematic diagram of the structure of the first battery pack in an embodiment of the present application.

[0033] Figure 3 A schematic diagram of the structure of the second battery pack in an embodiment of the present application.

[0034] Figure 4 This is a schematic diagram of the structure of the intermediate battery pack in an embodiment of the present application.

[0035] Figure 5 for Figure 1 Magnified view of section A.

[0036] Description of reference numerals:

[0037] 100-battery cluster;

[0038] 1-first battery pack; 11-first frame; 12-second frame; 13-first exhaust channel;

[0039] 2-second battery pack; 21-third frame; 22-fourth frame; 23-second exhaust channel;

[0040] 3-middle battery pack; 31-fifth frame;

[0041] 4-First cluster frame;

[0042] 5-second cluster frame;

[0043] 6-Connector;

[0044] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0047] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. For example, in the description of the present application, the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0051] In addition, the expressions of indicated directions such as the X direction, the Y direction, and the Z direction used to illustrate the operation and construction of the components of the present embodiment are not absolute but relative, and although these indications are appropriate when the components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0052] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0053] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0054] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] An electrical appliance refers to an electrical device that uses electrical energy to perform a specific function. Electrical appliances may include but are not limited to electric bicycles, electric passenger cars, electric commercial vehicles, electric heavy trucks, and energy storage cabinets. Among them, the above devices can all be powered by battery packs to meet the power requirements of different devices.

[0056] Some electrical devices on the market, such as electric heavy trucks and large equipment such as energy storage cabinets, require battery packs with extremely high energy density. Therefore, multiple battery packs can be connected in parallel or in series on a cluster rack to form a battery cluster with a large energy density to meet the power supply needs of the above electrical devices.

[0057] In the related art, a battery cluster includes multiple battery packs and multiple drawer-type cluster racks. A battery pack is hoisted and pushed into a drawer-type cluster rack and fixedly connected to the drawer-type cluster rack. However, if there are too many drawer-type cluster racks, the volume and weight of the battery cluster will be increased, and the production cost of the battery cluster will be increased.

[0058] Based on this, the present application provides a battery cluster, a battery cluster assembly method, and an electrical device, which reduces the volume and weight of the battery cluster by arranging two cluster racks and multiple battery packs in the battery cluster, thereby reducing the production cost of the battery cluster. Figure 1-5 Provide specific instructions.

[0059] In a first aspect, the present application provides a battery cluster 100, which may include: a first battery pack 1, a second battery pack 2, a first cluster frame 4, and a second cluster frame 5. The first battery pack 1 and the second battery pack 2 are stacked along a first direction X. The first direction X is the height direction of the battery cluster 100. The intermediate battery pack 3 is connected between the first battery pack 1 and the second battery pack 2. The first cluster frame 4 is connected to the first battery pack 1, and the first cluster frame 4 is used to provide structural protection for the first battery pack 1 and the second battery pack 2. The second cluster frame 5 is connected to the second battery pack 2, and the second cluster frame 5 is used to provide structural protection for the first battery pack 1 and the second battery pack 2.

[0060] The battery cluster 100 may include a cluster frame and a battery pack.

[0061] Among them, the cluster frame is used to install the battery pack and provide structural protection for the battery pack.

[0062] Among them, the battery pack can convert chemical energy into electrical energy. The battery pack can provide electrical energy for electrical devices.

[0063] Furthermore, large equipment such as electric heavy trucks and energy storage cabinets consume a lot of electricity when working. Therefore, multiple battery packs can be stacked along the height direction of the battery cluster 100, and the battery packs can be connected in parallel or in series to simultaneously supply power to the above-mentioned electrical devices, thereby meeting the power supply requirements of the above-mentioned electrical devices.

[0064] For example, Figure 1 As shown, the plurality of battery packs may include a first battery pack 1 and a second battery pack 2. The first battery pack 1 is a battery pack disposed at the top along a first direction X, and the second battery pack 2 is a battery pack disposed at the bottom along the first direction X. The first direction X is the height direction of the battery cluster 100.

[0065] Furthermore, electric heavy trucks and other electric devices may bump or collide during use, causing the battery packs in the devices to collide and damage the battery packs, thereby affecting the service life of the battery cluster 100 and further affecting the normal use of the devices.

[0066] Based on this, the first battery pack 1 and the second battery pack 2 can be fixed on a cluster frame to form a battery cluster 100. The cluster frame protects the battery packs from collision damage.

[0067] Furthermore, the battery cluster 100 is installed as a whole in the electrical device. When the electrical device needs to be replaced or the battery cluster 100 needs to be repaired, the battery cluster 100 needs to be hoisted as a whole to move the above operations. In the related art, the number of cluster racks in the battery cluster 100 is equal to the number of battery packs, so that one battery pack is installed on one cluster rack, which makes the battery cluster 100 larger in size and weight, increasing the production cost and hoisting difficulty of the battery cluster 100.

[0068] Based on this, in order to reduce the production cost of the battery cluster 100 and the difficulty of hoisting the battery cluster 100, as Figure 1 As shown, the present application is designed with a first cluster frame 4 and a second cluster frame 5 , so that the first cluster frame 4 is connected to the first battery pack 1 , and the second cluster frame 5 is connected to the second battery pack 2 .

[0069] The first cluster frame 4 is a frame structure, and the first cluster frame 4 can be made of steel or aluminum. When the first cluster frame 4 is made of steel, the structural strength of the first cluster frame 4 is higher. The first cluster frame 4 is connected to the first battery pack 1 to protect the first battery pack 1 and the second battery pack 2 facing the first cluster frame 4 to prevent collision damage.

[0070] In addition, if Figure 1 As shown, when the first cluster frame 4 is connected to the first battery pack 1, it is located on the top of the battery cluster 100, so that the first cluster frame 4 can provide a hoisting position for the battery cluster 100, thereby facilitating battery replacement of the electrical device.

[0071] Similarly, the second cluster frame 5 is a frame structure, and the second cluster frame 5 can be made of steel or aluminum. When the second cluster frame 5 is made of steel, the structural strength of the second cluster frame 5 is higher. The second cluster frame 5 is connected to the second battery pack 2 to protect the second battery pack 2 and the first battery pack 1 facing the second cluster frame 5 to prevent collision damage.

[0072] In addition, if Figure 1 As shown, the second cluster frame 5 is connected to the second battery pack 2 and is located at the bottom of the battery cluster 100. The second cluster frame 5 can be used to connect to an electric device so that the battery cluster 100 is installed on the electric device. For example, the second cluster frame 5 can be connected to a vehicle chassis.

[0073] In summary, the first cluster frame 4 and the second cluster frame 5 protect the multiple battery packs from both ends of the stacking direction of the multiple battery packs, preventing the multiple battery packs from collision damage, thereby ensuring the service life of the battery cluster 100, and further ensuring the normal use of the electrical device. In addition, the battery cluster 100 of the present application only includes the first cluster frame 4 and the second cluster frame 5, which reduces the number of cluster frames, reduces the volume and weight of the battery cluster 100, and reduces the production cost and hoisting difficulty of the battery cluster 100.

[0074] In addition, when the first cluster frame 4 and / or the second cluster frame 5 are made of aluminum, the first cluster frame 4 and / or the second cluster frame 5 are lighter, further reducing the difficulty of hoisting the battery cluster 100 .

[0075] According to the description of the above embodiments, the battery cluster 100 provided in the first aspect of the present application includes a first battery pack 1, a second battery pack 2, a first cluster frame 4 and a second cluster frame 5. The first battery pack 1 and the second battery pack 2 are stacked along the first direction X, so that the first battery pack 1 and the second battery pack 2 can simultaneously supply power to the electrical device to meet the power supply requirements of the electrical device. The first cluster frame 4 is connected to the first battery pack 1, and the second cluster frame 5 is connected to the second battery pack 2, which is used to prevent the first battery pack 1 and the second battery pack 2 from being damaged by collision, thereby ensuring the service life of the battery cluster 100, and further ensuring the normal use of the electrical device. In addition, the battery cluster 100 only includes the first cluster frame 4 and the second cluster frame 5, which reduces the volume of the battery cluster 100, reduces the weight of the battery cluster 100, and reduces the production cost and hoisting difficulty of the battery cluster 100.

[0076] Furthermore, in some embodiments, Figure 1 As shown, the battery cluster 100 may include one or more intermediate battery packs 3. The plurality of intermediate battery packs 3 are stacked along a first direction X, and the plurality of intermediate battery packs 3 are connected between the first battery pack 1 and the second battery pack 2.

[0077] The intermediate battery pack 3 is a battery pack disposed between the first battery pack 1 and the second battery pack 2 , so that the first battery pack 1 , the second battery pack 2 and the intermediate battery pack 3 are integrated into an integral structure, which facilitates the battery replacement operation of the electrical device or the maintenance operation of the battery cluster 100 .

[0078] According to the description of the above embodiment, the battery cluster 100 includes a plurality of intermediate battery packs 3, which increases the number of battery packs and improves the energy density of the battery cluster 100, so that the battery cluster 100 can adapt to electrical devices with greater power supply requirements.

[0079] Specifically, the number of intermediate battery packs 3 can be selected according to the power supply requirements of the power-consuming device. In addition, since the battery cluster 100 of the present application only includes the first cluster frame 4 and the second cluster frame 5, there is no need to adapt different numbers of cluster frames for different numbers of intermediate battery packs 3, so that the battery cluster 100 has universality, further reducing the production cost of the battery cluster 100.

[0080] Furthermore, the present application specifically describes the connection method between the first battery pack 1, the second battery pack 2, the middle battery pack 3, the first cluster rack 4 and the second cluster rack 5:

[0081] In some embodiments, Figure 2-Figure 4 As shown, the first battery pack 1 is provided with a first frame 11 and a second frame 12 oppositely disposed along the first direction X. The second battery pack 2 is provided with a third frame 21 and a fourth frame 22 oppositely disposed along the first direction X. The intermediate battery pack 3 is provided with two fifth frames 31 oppositely disposed along the first direction X. The two fifth frames 31 are connected to the first frame 11 and the third frame 21, respectively. The first cluster frame 4 is connected to the second frame 12, and the second cluster frame 5 is connected to the fourth frame 22, so that the first battery pack 1, the intermediate battery pack 3, and the second battery pack 2 are fixedly connected between the first cluster frame 4 and the second cluster frame 5.

[0082] The battery pack may include a battery module and a shell structure. The battery module is used to convert chemical energy into electrical energy. The battery module is arranged in the shell structure, and the shell structure is used to protect the battery module and prevent the battery module from being damaged or failing due to external factors, thereby ensuring the safety of the battery pack.

[0083] Since the first battery pack 1 is connected to the middle battery pack 3 and the first cluster frame 4 on two opposite sides along the first direction X, in order to take into account the stability of the above connection relationship and the safety of the battery pack, the first frame 11 and the second frame 12 are respectively provided on the two sides of the first battery pack 1 along the first direction X, the middle battery pack 3 is connected to the first frame 11, and the first cluster frame 4 is connected to the second frame 12, so as to avoid the shell structure of the first battery pack 1 from directly bearing stress due to the above connection relationship, thereby ensuring that the shell structure will not be damaged due to stress, and at the same time, the above connection relationship will not fail due to damage to the shell structure. That is, the stability of the above connection relationship and the safety of the battery pack are taken into account.

[0084] Similarly, the second battery pack 2 is connected to the second cluster frame 5 and the middle battery pack 3 on both sides along the first direction X. In order to take into account the stability of the above connection relationship and the safety of the battery pack, a third frame 21 and a fourth frame 22 are respectively provided on both sides of the second battery pack 2 along the first direction X, the middle battery pack 3 is connected to the third frame 21, and the second cluster frame 5 is connected to the fourth frame 22, so as to avoid the shell structure of the second battery pack 2 being directly subjected to stress due to the above connection relationship, thereby ensuring that the shell structure will not be damaged due to stress, and at the same time, the above connection relationship will not fail due to damage to the shell structure. That is, the stability of the above connection relationship and the safety of the battery pack are taken into account.

[0085] Similarly, the middle battery pack 3 is connected to the first battery pack 1 and the second battery pack 2 on both sides along the first direction X. In order to take into account the stability of the above connection relationship and the safety of the battery pack, two fifth frames 31 are respectively provided on both sides of the middle battery pack 3 along the first direction X, and the first battery pack 1 and the second battery pack 2 are respectively connected to the two fifth frames 31, so as to avoid the shell structure of the middle battery pack 3 directly bearing stress due to the above connection relationship, thereby ensuring that the shell structure will not be damaged due to stress, and at the same time, the above connection relationship will not fail due to damage to the shell structure. That is, the stability of the above connection relationship and the safety of the battery pack are taken into account.

[0086] In summary, the first battery pack 1 is provided with a first frame 11 and a second frame 12 relatively along the first direction X. The second battery pack 2 is provided with a third frame 21 and a fourth frame 22 relatively along the first direction X. The intermediate battery pack 3 is provided with two fifth frames 31 relatively along the first direction X. The two fifth frames 31 are respectively connected to the first frame 11 and the third frame 21, the first cluster frame 4 is connected to the second frame 12, and the second cluster frame 5 is connected to the fourth frame 22. While ensuring the stability of the connection between the first cluster frame 4, the first battery pack 1, the intermediate battery pack 3, the second battery pack 2, and the second cluster frame 5, the safety of the first battery pack 1, the intermediate battery pack 3, and the second battery pack 2 is ensured.

[0087] Specifically, in some embodiments, the first frame 11 , the second frame 12 , the third frame 21 , the fourth frame 22 and the fifth frame 31 have cavities therein for enhancing the structural strength of the first frame 11 , the second frame 12 , the third frame 21 , the fourth frame 22 and the fifth frame 31 .

[0088] Specifically, the first frame 11, the second frame 12, the third frame 21, the fourth frame 22 and the fifth frame 31 can be a profile structure or a rolled steel structure. In addition, the material of the first frame 11, the second frame 12, the third frame 21, the fourth frame 22 and the fifth frame 31 can be not limited to steel or aluminum.

[0089] Among them, the steel structure has good structural strength. The first frame 11, the second frame 12, the third frame 21, the fourth frame 22 and the fifth frame 31 are all made of steel, which can improve the stability of the connection between the first cluster frame 4, the first battery pack 1, the middle battery pack 3, the second battery pack 2 and the second cluster frame 5, and improve the overall structural strength of the battery cluster 100 to prevent the battery cluster 100 from collision damage.

[0090] Aluminum is light in weight. The first frame 11, the second frame 12, the third frame 21, the fourth frame 22 and the fifth frame 31 are all made of aluminum, which can reduce the weight of the first battery pack 1, the second battery pack 2 and the third battery pack 3, and reduce the difficulty of hoisting the battery cluster 100.

[0091] Furthermore, the profile structure may have one or more cavities. The cavity is used to absorb stress, thereby improving the structural strength. Therefore, the first frame 11, the second frame 12, the third frame 21, the fourth frame 22 and the fifth frame 31 are all profile structures, which can further improve the stability of the connection between the first cluster frame 4, the first battery pack 1, the middle battery pack 3, the second battery pack 2 and the second cluster frame 5, and improve the overall structural strength of the battery cluster 100 to avoid collision damage to the battery cluster 100.

[0092] In summary, the first frame 11, the second frame 12, the third frame 21, the fourth frame 22 and the fifth frame 31 are all steel profile structures, which can improve the stability of the connection between the first cluster frame 4, the first battery pack 1, the middle battery pack 3, the second battery pack 2 and the second cluster frame 5, and improve the overall structural strength of the battery cluster 100, thereby preventing the battery cluster 100 from being damaged by collision.

[0093] Furthermore, the battery pack can convert chemical energy into electrical energy. Specifically, the chemical reaction in the battery pack will generate gas and cause a temperature difference between the inside and outside of the battery pack, which will cause condensation on the shell structure of the battery pack. The long-term contact between the gas and condensation and the shell structure will cause the shell structure to corrode and age, thereby affecting the safety of the battery pack.

[0094] Based on this, in some embodiments, such as Figure 2-Figure 4 As shown, a first exhaust channel 13 is provided between the first battery pack 1 and the middle battery pack 3. The first exhaust channel 13 is provided on the first frame 11 and / or the fifth frame 31. A second exhaust channel 23 is provided between the second battery pack 2 and the middle battery pack 3. The second exhaust channel is provided on the third frame 21 and / or the fifth frame 31.

[0095] Specifically, the first battery pack 1 and the intermediate battery pack 3 are connected via the first frame 11 and the fifth frame 31. Therefore, the first exhaust channel 13 provided on the first frame 11 and / or the fifth frame 31 can be used to exhaust the gas and condensed water in the first battery pack 1 and the intermediate battery pack 3 to ensure the safety of the first battery pack 1 and the intermediate battery pack 3.

[0096] The second battery pack 2 and the middle battery pack 3 are connected through the third frame 21 and the fifth frame 31. Therefore, the second exhaust channel 23 provided on the third frame 21 and / or the fifth frame 31 can be used to exhaust the gas and condensed water in the second battery pack 2 and the middle battery pack 3 to ensure the safety of the second battery pack 2 and the middle battery pack 3.

[0097] Furthermore, the first frame 11, the third frame 21 and the fifth frame 31 are all profile structures with high structural strength. Therefore, when the first exhaust channel 13 and the second exhaust channel 23 are opened on the first frame 11, the third frame 21 and the fifth frame 31, the structural strength of the battery pack can be ensured, and the safety of the first battery pack 1, the middle battery pack 3 and the second battery pack 2 can be further ensured.

[0098] In summary, the first exhaust channel 13 is arranged on the first frame 11 and / or the fifth frame 31, and the second exhaust channel is arranged on the third frame 21 and / or the fifth frame 31. The first exhaust channel 13 is used to discharge the gas and condensed water in the first battery pack 1 and the middle battery pack 3, and the second exhaust channel 23 is used to discharge the gas and condensed water in the second battery pack 2 and the middle battery pack 3, so as to ensure the safety of the first battery pack 1, the second battery pack 2 and the middle battery pack 3.

[0099] Furthermore, the present application may also specifically define the structures of the first exhaust channel 13 and the second exhaust channel 23:

[0100] In some embodiments, the first exhaust channel 13 and the second exhaust channel 23 are both groove structures.

[0101] Specifically, the first exhaust channel 13 and the second exhaust channel 23 may both be groove structures. Figure 4As shown, the groove structure provided on the first frame 11 and / or the fifth frame 31 can make a gap between the connection surfaces of the first battery pack 1 and the middle battery pack 3, so that the gas and condensed water can be discharged through the above gap. Similarly, the groove structure provided on the third frame 21 or the fifth frame 31 can make a gap between the connection surfaces of the second battery pack 2 and the middle battery pack 3, so that the gas and condensed water can be discharged through the above gap.

[0102] Furthermore, one or more of the above-mentioned grooves may be provided on the first frame 11 , the third frame 21 and the fifth frame 31 , and the above-mentioned groove structure may be provided in any direction.

[0103] For example, Figure 2-Figure 4 As shown, one or more groove structures are opened on the first frame 11, the third frame 21 or the fifth frame 31 along the second direction Y. One or more groove structures are opened on the first frame 11, the third frame 21 or the fifth frame 31 along the third direction Z. The second direction Y may be the length direction of the battery cluster 100. The third direction Z may be the width direction of the battery cluster 100.

[0104] To summarize, the first exhaust channel 13 and the second exhaust channel 23 are both groove structures, so that there is a gap between the connecting surfaces of the first battery pack 1 and the middle battery pack 3, and there is a gap between the connecting surfaces of the second battery pack 2 and the middle battery pack 3, so that the condensed water and gas in the first battery pack 1, the middle battery pack 3 and the second battery pack 2 can be discharged smoothly.

[0105] Furthermore, in order to facilitate the maintenance and replacement of the first cluster frame 4, the first battery pack 1, the intermediate battery pack 3, the second battery pack 2 and the second cluster frame 5, the present application has also made the following improvements:

[0106] In some embodiments, a plurality of first connectors 6 are provided between the first cluster frame 4 and the first battery pack 1, for fixing the first cluster frame 4 and the first battery pack 1. A plurality of second connectors 6 are provided between the first battery pack 1 and the intermediate battery pack 3, for fixing the first battery pack 1 and the intermediate battery pack 3. A plurality of third connectors 6 are provided between the second battery pack 2 and the intermediate battery pack 3, for fixing the second battery pack 2 and the intermediate battery pack 3. A plurality of fourth connectors 6 are provided between the second cluster frame 5 and the second battery pack 2, for fixing the second cluster frame 5 and the second battery pack 2.

[0107] Specifically, a plurality of first connectors 6 are provided between the first cluster frame 4 and the first battery pack 1 for fixing the first cluster frame 4 and the first battery pack 1 to ensure the connection strength between the first cluster frame 4 and the first battery pack 1 while making the connection between the first cluster frame 4 and the first battery pack 1 detachable.

[0108] A plurality of second connectors 6 are provided between the first battery pack 1 and the intermediate battery pack 3 for fixing the first battery pack 1 and the intermediate battery pack 3 to ensure the connection strength between the first battery pack 1 and the intermediate battery pack 3 while making the connection between the first battery pack 1 and the intermediate battery pack 3 detachable.

[0109] A plurality of third connecting members 6 are provided between the second battery pack 2 and the intermediate battery pack 3 for fixing the second battery pack 2 and the intermediate battery pack 3 to ensure the connection strength between the second battery pack 2 and the intermediate battery pack 3 while making the second battery pack 2 and the intermediate battery pack 3 detachably connected.

[0110] A plurality of fourth connecting members 6 are provided between the second cluster frame 5 and the second battery pack 2 for fixing the second cluster frame 5 and the second battery pack 2, thereby ensuring the connection strength between the second cluster frame 5 and the second battery pack 2 and making the second cluster frame 5 and the second battery pack 2 detachably connected.

[0111] In summary, the first cluster frame 4 and the first battery pack 1 are connected by multiple first connecting members 6, the first battery pack 1 and the intermediate battery pack 3 are connected by the second connecting member 6, the second battery pack 2 and the intermediate battery pack 3 are connected by the third connecting member 6, and the second cluster frame 5 and the second battery pack 2 are connected by the fourth connecting member 6. While ensuring the structural strength of the battery cluster 100, the inspection and replacement of the first cluster frame 4, the first battery pack 1, the intermediate battery pack 3, the second battery pack 2 and the second cluster frame 5 are facilitated.

[0112] Specifically, Figure 5 As shown, the first connecting member 6, the second connecting member 6, the third connecting member 6 and the fourth connecting member 6 may include but are not limited to welding bolts, rivet bolts, etc.

[0113] Further, in some embodiments, the number of the first connecting member 6 , the second connecting member 6 , the third connecting member 6 , and the fourth connecting member 6 is greater than or equal to 8.

[0114] Specifically, the more the number of first connectors 6 is, the greater the connection strength between the first cluster frame 4 and the first battery pack 1 is. However, considering the cost issue, the number of first connectors 6 can be greater than or equal to 8 to ensure the connection strength between the first cluster frame 4 and the first battery pack 1, and further ensure the structural strength of the battery cluster 100.

[0115] Similarly, the more the number of second connectors 6 is, the greater the connection strength between the first battery pack 1 and the middle battery pack 3 is. However, considering the cost issue, the number of second connectors 6 can be greater than or equal to 8 to ensure the connection strength between the first battery pack 1 and the middle battery pack 3, and further ensure the structural strength of the battery cluster 100.

[0116] Similarly, the more the number of third connectors 6 is, the greater the connection strength between the second battery pack 2 and the middle battery pack 3 is. However, considering the cost issue, the number of third connectors 6 can be greater than or equal to 8 to ensure the connection strength between the second battery pack 2 and the middle battery pack 3, and further ensure the structural strength of the battery cluster 100.

[0117] Similarly, the more the number of fourth connecting members 6 is, the greater the connection strength between the second cluster frame 5 and the second battery pack 2 is. However, considering the cost issue, the number of fourth connecting members 6 can be greater than or equal to 8 to ensure the connection strength between the second cluster frame 5 and the second battery pack 2, and further ensure the structural strength of the battery cluster 100.

[0118] In summary, when the number of the first connector 6 , the second connector 6 , the third connector 6 and the fourth connector 6 is greater than or equal to 8, the production cost of the battery cluster 100 can be reduced while ensuring the structural strength of the battery cluster 100 .

[0119] Furthermore, in some embodiments, a lifting structure is provided on a side of the first cluster frame away from the first battery pack, and the lifting structure is used to install or remove the battery cluster.

[0120] In a second aspect, the present application provides a method for assembling a battery cluster, for assembling the battery cluster described in any one of the above embodiments, the method comprising:

[0121] Step 1: Obtain a first battery pack, an intermediate battery pack, and a second battery pack.

[0122] Step 2: stack the first battery pack, the middle battery pack and the second battery pack in sequence along a first direction to obtain a first assembly component.

[0123] Step 3: Get the second cluster frame.

[0124] Step 4: Connect the second cluster frame to the second battery pack, so that the second cluster frame and the first assembly component form a second assembly component.

[0125] Step 5: Get the first cluster frame.

[0126] Step six: Connect the first cluster frame to the first battery pack to form the battery cluster, so that the first battery pack, the middle battery pack and the second battery pack are fixedly connected between the first cluster frame and the second cluster frame.

[0127] In the related art, each battery pack corresponds to a cluster rack, and the cluster rack is a drawer structure. When assembling the battery cluster, the battery pack needs to be pushed into the drawer, causing hard friction between the battery pack and the drawer, thereby damaging the battery pack and the cluster rack. In addition, after the battery pack is pushed into the drawer, the connection position between the battery pack and the cluster rack cannot be accurately determined, thereby increasing the assembly time of the battery rack and increasing the production cost.

[0128] Based on this, in the assembly method of the present application, the first battery pack, the second battery pack and the third battery pack are directly stacked and connected to the second cluster frame, and then connected to the first cluster frame, so as to avoid damage to the battery pack and the cluster frame due to hard friction, thereby ensuring the service life and safety of the battery cluster. In addition, the first battery pack, the second battery pack and the third battery pack are pre-assembled in advance, and there is no problem of inaccurate positioning.

[0129] In a third aspect, the present application provides an electrical device, characterized in that it comprises a battery cluster according to any one of the above embodiments. The battery packs in the battery cluster are used to provide electrical energy.

[0130] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0131] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cluster, characterized in that: include: A first battery pack, a second battery pack, a first cluster rack, and a second cluster rack; The first battery pack and the second battery pack are stacked along a first direction; Wherein, the first direction is the height direction of the battery cluster; The first cluster frame is connected to the first battery pack, and the first cluster frame is used to provide structural protection for the first battery pack and the second battery pack; The second cluster frame is connected to the second battery pack, and the second cluster frame is used to provide structural protection for the first battery pack and the second battery pack.

2. The battery cluster according to claim 1, characterized in that: The battery cluster includes one or more intermediate battery packs; The plurality of intermediate battery packs are stacked along the first direction, and the plurality of intermediate battery packs are connected between the first battery pack and the second battery pack.

3. The battery cluster according to claim 2, characterized in that: The first battery pack is provided with a first frame and a second frame opposite to each other along the first direction; The second battery pack is provided with a third frame and a fourth frame opposite to each other along the first direction; The middle battery pack is provided with two fifth frames opposite to each other along the first direction; The two fifth frames are respectively connected to the first frame and the third frame; The first cluster frame is connected to the second frame, and the second cluster frame is connected to the fourth frame, so that the first battery pack, the middle battery pack and the second battery pack are fixedly connected between the first cluster frame and the second cluster frame.

4. The battery cluster according to claim 3, characterized in that: A first exhaust channel is provided between the first battery pack and the middle battery pack; Wherein, the first exhaust channel is arranged on the first frame and / or the fifth frame; A second exhaust passage is provided between the second battery pack and the middle battery pack; Wherein, the second exhaust channel is arranged on the third frame and / or the fifth frame.

5. The battery cluster according to claim 4, characterized in that: The first exhaust channel and the second exhaust channel are both groove structures.

6. The battery cluster according to claim 3, characterized in that: The first frame, the second frame, the third frame, the fourth frame and the fifth frame all have cavities therein for enhancing the structural strength of the first frame, the second frame, the third frame, the fourth frame and the fifth frame.

7. The battery cluster according to claim 2, characterized in that: A plurality of first connectors are provided between the first cluster frame and the first battery pack for fixing the first cluster frame and the first battery pack; A plurality of second connectors are provided between the first battery pack and the intermediate battery pack for fixing the first battery pack and the intermediate battery pack; A plurality of third connecting members are provided between the second battery pack and the intermediate battery pack for fixing the second battery pack and the intermediate battery pack; A plurality of fourth connecting members are provided between the second cluster frame and the second battery pack for fixing the second cluster frame and the second battery pack.

8. The battery cluster according to claim 7, characterized in that: The number of the first connecting member, the second connecting member, the third connecting member and the fourth connecting member is greater than or equal to 8.

9. A method for assembling a battery cluster, used for assembling the battery cluster according to any one of claims 1 to 8, characterized in that: The method comprises: Obtain a first battery pack, an intermediate battery pack, and a second battery pack; stacking the first battery pack, the middle battery pack and the second battery pack in sequence along a first direction to obtain a first assembly component; Get the second cluster frame; Connecting the second cluster frame to the second battery pack so that the second cluster frame and the first assembly component form a second assembly component; Get the first cluster frame; The first cluster frame is connected to the first battery pack to form the battery cluster, and the first battery pack, the middle battery pack and the second battery pack are fixedly connected between the first cluster frame and the second cluster frame.

10. An electrical device, characterized in that: A battery cluster comprising any one of claims 1 to 9; The battery packs in the battery cluster are used to provide electrical energy.

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